There are several synonyms for the term "input-output model" which is widely used in economic analysis. One such synonym is the Leontief model, named after Wassily Leontief, who developed it. Another synonym for an input-output model is the interdependence model. This model represents the interdependence of industries on each other, as well as the flow of goods and services between them. A similar concept is the circular flow model which illustrates the flow of money, goods, and services between households and businesses. In addition, the term production model is sometimes used interchangeably with the input-output model. Regardless of the term used, these analytical tools are crucial in understanding the interdependencies and complexities of an economy.